Alexander Wolf
Forum Replies Created
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I switched to ProRes…
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I guess this will remain a mystery forever. I just created a new photo-jpeg setting again on both machines following the exact same procedure. Opened Compressor, new settings, change QT setting to photo-jpg, change slider to Best. That’s it.
Then I exported a 6 second UHD clip from FCP X on both machines using this new preset.
On my MB Pro (running Compressor 4.2) I generated a 675 MB file with a data rate of 894 Mbit/s
On my iMac (running Compressor 4.2.1) I generated a 47 MB file with a data rate of 62 Mbit/s
Freakin’ frustrating as hell…
(I think I figured it out: it’s Apple’s way of saying “Abandon photo-jpeg, embrace ProRes!”)
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Best…
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Thanks for the effort, RK.
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I thought Robin S. Kurz would have an opinion on my screenshots! Maybe you didn’t notice but I shared the settings from Compressor 4.2 and 4.2.1.
I also included the 2 QT files showing their respective specifications. Can you figure it out, Robin? -
No takers? I posted some screenhots but I guess this will remain a mystery…
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I’ve been using a preset I created: New Setting-QT movie – in the inspector pane I changed the QT settings to photo-jpeg. That’s all. I just created new settings in the exact same way on my MB Pro and iMac: 200 MB file vs an 18 MB file.
I’ve also checked on Pond5 to see what another contributor’s file sizes are for photo-jpeg. They are much, much higher than 15MB for a 6 second file. They approximate what I’ve been producing in the last year- until something inexplicably changed…
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Thanks, Tero.
Isn’t that an extremely low data rate? 10mbit/s?
I’ve been generating files at much higher data rates for the last year on my iMac and for some reason this has changed in the last month. The only thing I can think of is the Compressor upgrade. Why would I change the Compressor settings when it has worked for me for the last year?? (I never even use Compressor, except when I created a preset for FCP X a long time ago)
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But how come exporting photo-jpeg from my iMac 5K generates a 15MB file from a 6 second HD clip while the exact same clip generates a 200MB file on my MB Pro?
Has Apple reduced the base setting for data rate in the photo-jpeg setting by factor 14 in their Compressor upgrade from 4.2 to 4.2.1? (no mention in their release note) Weird!
I hope it’s not too much to ask but could someone please export a 6 second HD clip from Compressor 4.2.1 in photo-jpeg and see how big the file turns out?
Would really appreciate it.
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Since there is no Apple Compressor forum (?) and the Compression Techniques forum seems like a very lonely place, I’d like to call out to some sharp souls out here and help me figure out how to change data rates in Apple Compressor, specifically in Photo-Jpeg.
